1: dimethylformamide / 12 h / Heating 2: aq. cerium ammonium nitrate / acetonitrile / 1 h / 20 °C View Scheme

1: dimethylformamide / 12 h / Heating 2: aq. cerium ammonium nitrate / acetonitrile / 1 h / 20 °C 3: 65 percent / AgNO3; aq. (NH4)2S2O8 / acetonitrile / 2 h / 75 °C 4: 89 percent / benzylidenebis(tricyclohexylphosphine)dichlororuthenium / toluene / 24 h / 20 - 100 °C 5: 88 percent / Pd/C / toluene / Heating View Scheme